Turning Carbon Nanotubes from Exceptional Heat Conductors into Insulators

被引：279

作者：

Prasher, Ravi S. ^{[1
]}

Hu, X. J. ^{[2
]}

Chalopin, Y. ^{[3
]}

Mingo, Natalio ^{[4
]}

Lofgreen, K. ^{[1
]}

Volz, S. ^{[3
]}

Cleri, F. ^{[5
]}

Keblinski, Pawel ^{[6
]}

机构：

[1] Arizona State Univ, Dept Mech & Aerosp Engn, Tempe, AZ 85287 USA

[2] Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China

[3] Ecole Cent Paris, CNRS, Lab Energet Mol & Macroscop, UPR 288, Paris, France

[4] CEA Grenoble, LITEN, F-3804 Grenoble 9, France

[5] Univ Sci & Technol Lille, Inst Elect Microelect & Nanotechnol, CNRS, UMR 8520, Lille, France

[6] Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 10期

关键词：

THERMAL-CONDUCTIVITY; FILMS;

D O I：

10.1103/PhysRevLett.102.105901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Thermal conductivity (kappa) of isolated carbon nanotubes (CNTs) is higher than the kappa of diamond; however, in this Letter we show that the kappa of a packed bed of three-dimensional random networks of single and multiwall CNTs is smaller than that of thermally insulating amorphous polymers. The thermoelectric power (Sigma) of the random network of CNTs was also measured. The Sigma of a single wall nanotube network is very similar to that of isolated nanotubes and, in contrast with kappa, Sigma shows a strong dependence on the tube diameter.

引用

页数：4

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